change [x for x in y if x] to filter(None, y)
change [f(x) for x in y] to map(f, x)
change [x for x in y] to list(y)
These changes reduce source code size and complexity and produce some minor performance gains
svn: r14104
2. Change include_object to include_media_object to avoid confusion
3. Make _validated_id_prefix method in read.py a staticmethod
4. Use new iter_<objects> methods in Records.py, StatsgGramplet.py, GivenNameGramplet.py, ExtractCity.py and _IsSiblingOfFilterMatch.py as examples
svn: r13151